VoIP Network Engineer

2 weeks ago

Islamabad, Islamabad, Pakistan Burgeon Full time 240,000 - 720,000 per year

Job Summary

This is a freelance position. We are looking for a highly motivated VoIP Network Engineer with 2 to 4 years of hands-on experience in Asterisk-based PBX systems, VoIP technologies, and cloud-enabled UCaaS solutions. The ideal candidate is skilled in SIP protocols, VoIP architecture, and has a strong background in Linux systems, networking, and telephony automation.

Key Responsibilities

  • Administer and support Asterisk PBX, IVR, and global call center environments.
  • Serve as a subject matter expert in SIP voice protocols and cloud UCaaS solutions.
  • Configure and optimize voice networks for best-in-class call quality and minimal latency.
  • Maintain and enhance Quality of Service (QoS) across VoIP networks.
  • Develop, maintain, and troubleshoot SMPP and API-based SMS communication systems.
  • Implement VoIP security measures and ensure system redundancy and failover.
  • Analyze system performance on Linux-based servers focusing on scalability, QoS, and high availability.
  • Design and develop telephony-integrated applications for real-time monitoring and management.
  • Write and maintain automation scripts using Python, PHP, Perl, Bash, etc.
  • Stay updated with emerging VoIP technologies and drive innovation within the telephony infrastructure.
  • Collaborate cross-functionally with teams to ensure service quality meets or exceeds SLAs.
  • Troubleshoot complex VoIP, SIP, and interconnect issues with carriers and end-points.

Required Skills & Qualifications

  • Linux Proficiency: Strong system administration skills with FreePBX, Red Hat/CentOS, Ubuntu/Debian.
  • Networking: Deep understanding of TCP/IP, routing, switching, and QoS in VoIP environments.
  • VoIP Expertise: Hands-on experience with Asterisk, FreeSWITCH, Kamailio, OpenSIPS.
  • Protocol Knowledge: SIP, RTP, RTCP, SDP, IAX, WebRTC (WS/WSS).
  • Scripting & Automation: Strong scripting skills in Python, PHP, Perl, Bash.
  • Database: Familiarity with MySQL and ability to write efficient SQL queries.
  • Telephony Systems: In-depth knowledge of Asterisk features like AGI, ARI, queues, conferencing.
  • SMPP: Experience working with SMPP protocol for SMS.
  • Security: Understanding of VoIP security best practices and implementation.
  • Problem-Solving: Strong analytical and troubleshooting abilities for network and VoIP issues.
  • Communication: Excellent verbal and written communication skills with a collaborative mindset.
  • Adaptability: Ability to keep pace with evolving technologies and changing business needs.

Nice to Have

  • Experience with WebRTC-based voice and video technologies.
  • Exposure to cloud-based UCaaS platforms (e.g., Twilio, RingCentral, 3CX, etc.).
  • Familiarity with DevOps tools for CI/CD pipelines in telephony environments.

Job Type: Part-time

Pay: Rs200, Rs300,000.00 per month

Expected hours: 20 per week

Work Location: In person

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